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Problems After Replacing exhaust manifold bolts

This is a discussion on Problems After Replacing exhaust manifold bolts within the Technical / Maintenance forums, part of the General Discussion category; I have a 05 1500 Sierra 4x4 with a 5.3lt I replaced all my exhaust manfold bolts that hold the ...

  1. #1
    Registered User
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    Problems After Replacing exhaust manifold bolts


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    I have a 05 1500 Sierra 4x4 with a 5.3lt
    I replaced all my exhaust manfold bolts that hold the manifolds to the cyl heads, strangly after i'm all done and started the truck a few times, the engine light came on with codes P0171, and P0300. I quickly checked the Misfire data with the Tech 2and sprayed water around bank 1 intake ports, it looked as if that whole side was missing. I got some gaskets and changed them......And ofcourse it didn't make a difference...I kinda jumped to conclusions i think, i then checked my Data and noticed that my B1S1 02 is dead at 4mv and not switching at all...now does anyone think what are the odds that i might of damaged my O2 sensor when i removed the manifold to replace the bolts? i'm thinking yes, but i don't want to spend money for nothing again

  2. #2
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    Re: Problems After Replacing exhaust manifold bolts

    What is the size of the bolts?


    Quote Originally Posted by Blazer79 View Post
    I have a 05 1500 Sierra 4x4 with a 5.3lt
    I replaced all my exhaust manfold bolts that hold the manifolds to the cyl heads, .......

  3. #3
    Registered User
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    Re: Problems After Replacing exhaust manifold bolts

    the manifold bolts you get from GM are an 8MM metric bolt, about an an inch long

  4. #4
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    Re: Problems After Replacing exhaust manifold bolts

    bump..

  5. #5
    Not Really Bob
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    Newark, DE
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    Re: Problems After Replacing exhaust manifold bolts

    Check the O2 sensor wires.
    99 Silverado ECSB 4X4, LQ4, Patriot Stg. 2 243's w/ 59cc chambers, TR224-112, Pacesetter LT's, Nelson tune, FLT Lvl 5.5, PI 3400, UD pulley, 160* t-stat, E-fans, 6'' Fabtech lift, 3'' body lift, 37'' XTerrains, 4.56's, 4'' shackle flip 13.3 @ 99mph on 37's or 13.0 @ 101mph on 31's

 

 

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